関連ワード:
is the mantle the thickest layer is the mantle the thickest layer of earth is the mantle the densest layer is the mantle the thinnest layer is the mantle the thinnest layer of earth is the mantle the densest layer of earth is the lower mantle the thickest layer is the upper mantle the thickest layer is the mantle the thickest part the mantle is the thickest layer at about 3000 kilometers thick
